This article focuses on the synthesis of nickel borides in different molten-salt systems (eutectic NaCl/KCl and borax) at elevated temperatures. The differences in the thermodynamic stability of different nickel borides and the formation of NiB in an eutectic halite-sylvine mixture at T = 950 °C with different nickel-containing starting materials (NiO, Ni) has been elucidated. The results are compared to theoretical data calculated by the Calphad method. The results of the analysis shows that NiB2, if it exists, may only form a metastable phase.

中文翻译：

---

高温熔盐中硼化镍的合成及 Ni-B 体系的热力学表征

本文重点介绍在高温下不同熔盐系统（低共熔氯化钠/氯化钾和硼砂）中硼化镍的合成。不同硼化镍热力学稳定性的差异以及在盐石-钾盐共晶混合物中 NiB 的形成时间= 950 °C 已阐明不同的含镍起始材料（NiO、Ni）。将结果与 Calphad 方法计算的理论数据进行比较。分析结果表明NiB2，如果存在，可能仅形成亚稳态相。